Applying a git post-commit hook to all current and future repos

As of git 1.7.1, you can set init.templatedir in your gitconfig to tell git where to look for templates.

Set it like this:

git config --global init.templatedir '~/.git_template'

Afterward, new repositories you create or clone will use this directory for templates. Place the hooks you want in ~/.git_template/hooks. Existing repositories can be reinitialized with the proper templates by running git init in the same directory .git is in.

For git versions older than 1.7.1, running git init --template ~/.git_template will work if you're like me and still want to manage your .git_template dir along with the rest of your dot files. You can also use the $GIT_TEMPLATE_DIR environment to tell git init where your template directory is.

I want to add this hook to apply to all current (and future) git repositories I am working on

With git 2.9+ (June 2016), all you would do is:

git config --global core.hooksPath /path/to/my/centralized/hooks

See "change default git hooks": this has been done to manage centralized hooks.

If you want them everywhere on your system (including users besides you), you can modify the contents of the installed template directory - those are in $PREFIX/share/git-core/templates/hooks, where $PREFIX is probably /usr/local or /usr.

If you want this to just be for you, then yes, the simplest thing would be the --template option of git-init. You could easily keep a personal template directory which has symlinks back to the installed version of defaults you want to keep (individual hooks, the info directory...) and then your own content in hooks/post-commit and anything else you want to customize.